<?php
/**
 * Piwik - Open source web analytics
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 * @category Piwik_Plugins
 * @package Piwik_SEO
 */

/**
 * @see plugins/Referers/functions.php
 */
require_once PIWIK_INCLUDE_PATH . '/plugins/Referers/functions.php';

/**
 * The SEO API lets you access a list of SEO metrics for the specified URL: Google Pagerank, Goolge/Bing indexed pages
 * Alexa Rank, age of the Domain name and count of DMOZ entries.
 * 
 * @package Piwik_SEO
 */
class Piwik_SEO_API 
{
	static private $instance = null;
	/**
	 * @return Piwik_SEO_API
	 */
	static public function getInstance()
	{
		if (self::$instance == null)
		{
			self::$instance = new self;
		}
		return self::$instance;
	}
	
	/**
	 * Get rank
	 *
	 * @param string $url URL to request Ranks for
	 * @return Piwik_DataTable
	 */
	public function getRank( $url )
	{
		Piwik::checkUserHasSomeViewAccess();
		$rank = new Piwik_SEO_RankChecker($url);
		
		$data = array(
			'Google PageRank' 	=> array(
				'rank' => $rank->getPageRank(),
				'logo' => Piwik_getSearchEngineLogoFromUrl('http://google.com'),
				'id' => 'pagerank'
			),
            Piwik_Translate('SEO_Google_IndexedPages') => array(
                'rank' => $rank->getIndexedPagesGoogle(),
                'logo' => Piwik_getSearchEngineLogoFromUrl('http://google.com'),
                'id' => 'google-index',
            ),
            Piwik_Translate('SEO_Bing_IndexedPages') => array(
                'rank' => $rank->getIndexedPagesBing(),
                'logo' => Piwik_getSearchEngineLogoFromUrl('http://bing.com'),
                'id' => 'bing-index',
			),
			Piwik_Translate('SEO_AlexaRank') => array(
				'rank' => $rank->getAlexaRank(),
				'logo' => Piwik_getSearchEngineLogoFromUrl('http://alexa.com'),
				'id' => 'alexa',
			),
			Piwik_Translate('SEO_DomainAge') => array(
				'rank' => $rank->getAge(),
				'logo' => 'plugins/SEO/images/whois.png',
				'id'   => 'domain-age',
			),
		);

		// Add DMOZ only if > 0 entries found
		$dmozRank = array(
			'rank' => $rank->getDmoz(),
			'logo' => Piwik_getSearchEngineLogoFromUrl('http://dmoz.org'),
			'id'   => 'dmoz',
		);
		if($dmozRank['rank'] > 0)
		{
			$data[Piwik_Translate('SEO_Dmoz')] = $dmozRank;
		}

		$dataTable = new Piwik_DataTable();
		$dataTable->addRowsFromArrayWithIndexLabel($data);
		return $dataTable;
	}
}
